# -sys

## Introduction

The -sys option is only available when the UDF
(User Defined Function) extension is installed.
The -sys option runs a shell command.

## Usage

```
-sys STRING

STRING is a shell command
```

### Comments

The UDF options may not work in windows.

The use of the UDF options is limited and the UDF options should, IMHO,
not be enabled unless the UDF options are needed.

See alse: [-udf_arg](./udf_arg.md),
[-udf](./udf.md),

---

> Description: misc X run system/shell command, X=shell command

_Docs derived from <https://www.cpc.ncep.noaa.gov/products/wesley/wgrib2/sys.html>_
